Finishing device



. I. HARRISON l FINISHING DEVICE Filed Jan. 29,' 1945 Patented May 4, 1948 FINIsmNG DEVICE.

Eugene I. Harrison,

Downers Grove,

Ill., assignor of one-half to John J. Bailey, Chicago, Ill. Application January 29, 1945, serial No. 574,993

(ci. '5i- 193)v 8 Claims.

This invention relates to a nishing device *for grinding, burring and finishing material, suchv as metal. The device is used particularly in 'connection with finishing the internal surfaces of tubular articles. l

An important object ofthe present invention is the provision ofa finishing device of new and novel construction including a mandrel or other similar driving element Awhich is adapted to have fastened thereto a iinishing element; such as a plurality of layers or plies of material, such as fabric, or of sheet abrasive material, such as sandpaper, the mandrel being adapted to be received in'a pocket formed in the sheet material.

'Another important object of the invention resides in the provision of a. finishing element in the form of a pad, including a plurality of layers of material, the layers of material being suitably stitched together and provided with a pocket therein, into which an element is adapted to be removably inserted for driving' the finishing element.

A further object' of the invention is the provision of a new and improved mandrel for having locking engagement with a plurality of'sheets of material whereby the mandrel may be removably inserted in a pocket formed in the sheets of material. `1 I A still further object of the invention is the provision of sheets of material cut to the proper configuration and stitched longitudinally thereof on both sides of its longitudinal center line to form a pocket for receiving a driving element.

Still another object of the invention resides in aplurality of layers of material to form a finishing device by stitching together a plurality of the material having an abraabrasive surface being so arranged so that opposite sides thereof provide the material contacting surfaces adaptable for rotative movement in opposite directions within a tubular object.

Numerous other objects and advantages will be apparent throughout the progress of the following specification.l

The accompanying drawing illustrates a selective embodiment of the invention, and the views therein are as follows:

Fig. 1 is a detail perspective view of one form of finishing device and embodying the invention;

Fig. 2 is a detail transverse sectional view on the line 2-2 of Fig. 1,' f

Fig. 3 is a detail perspective view of one form. of mandrel or driving element;

Fig. 4 is a detail transverse sectional View showiing the manner in which the nishing element maybe used for finishing the inner surfaces of tubes and the like;

Figs. 5, 6 and '7 are detail plan views showing various forms of finishing elements or pads, each constructed of a plurality of layers of abrasive material and being stitched thereon to provide a central pocket for the reception of a mandrel;

Fig. 8 is a detail transverse sectional view of a modified form of mandrel showing the manner in which the mandrel may be inserted inthe pocket of the finishingelement; o 1 f Fig. 9V is a detail transverse sectional view of another modified form of mandrel showing the manner in'which the mandrel may be mounted with respect to the' finishing element; and

Fig. 10 is a detail transverse sectional view on the line Ill- III of Figs. 2, 4 and 9. y Y

The particular construction herein shown for the purpose of illustrating the invention comprises a finishing element or pad I which may comprise a plurality of layers of material 2. The layers of material 2 are superimposed one upon the other and are stitched along the line 3 3 on opposite sides of the longitudinal axial lcenter line ofv the element to provide a recess'or pocket 4 to receive a driving element such asa mandrel 5. The mandrel 5 may be made of metal and provided with a slot 6, Fig. 3, to provide space legs 'I and 8 as shown in Fig. 3. 'Ihe mandrel 5 may be inserted within the pocket 4 so that the two center plies 9r of the material 2, Figs. 2 and 4, may be received within the slot 6 of the mandrel. The outer layers I0, I0 of the material may comprise the pocket forming part of the element and extend about the legs 'I and 8 as clearly shown in Figs. 2 and 4. Y

VThe mandrel disclosed in Fig. 8 may comprise a flattened mandrel II, being greater in one cross-sectional dimension than in the other whereby a relatively fiat mandrel is provided. This at mandrel I I is adapted to be inserted within the pocket 4 as clearly shown in Fig. 8 whereby two plies of material 2 will be on opposite sides as shown in Fig. 8. The use o1 a nattened mandrel in many instances is desirable in that it maybe applied and removed quickly and readily, and, because of its attened construction, will cause rotation of the element upon rotation of the mandrel'without the mandrel rotating with respect to the element itself.

The embodiment shown in Fig, 9 comprises a mandrel I2 provided with slots I3 and I4 forming exterior legs I5 and I6 and a central leg or .prong I1. The mandrel Il is adapted to be in;-

3 serted within the pocket with two layers of the material received in a slot I3 and the two remaining layers received in the other slot I4 whereby the positive driving connection is provided between the element which is made up of 5 the drawing;

forming the element or pad I but it is obviousL that a greater or lesser number of sheets ofvm-atef rial or plies may be used if desired.

wlhether it be the mandrel 5, II or which the element is made may be fabric or it may be an abrasive material, such as sandpaper or emery cloth. It is desirable that the element I be composed of a plurality of layers of material stitched together as indicated at 3 to provide the Vpocket 4 into which the mandrel may be inserted. The mandrel may be of any desired shape or construction, such as the mandrels IiIliorI 2%.,orrthe2mand1els inlay beofany other desired2T shapeL orconguratiorr capableA of performing the functionintended. The mandrel, I2, may be a separate element adapted to be mounted in a ch'ucl:` of'a revolving machine part or it may be a The material from whiclrtheselementeiyigscena-isa toolrofaimachmea. .Regardless of the shape, size structed is preferably cut front^'sl'eets='orial, such as fabric, sandpaper lor vremery cloth, dee` pending upon the type of iinishing desired.' Tle configuration of the material may be of anyparw ticular shape preferredfor performing the metal rrishingoperation :on the :inside O-cylinders and other-tubes. 'The element l imayscomprise layers or plies of material 2 conguratedtor-bestsuit the'fpurpose; therefbeingzvarious forms'desirable, such as shownrinrFigs; 1- and". 5e to 97,-. inclusisve: Tlleepliesof material 2;, as shown in lig Lhave relatively straight sidesfconvergingidownwardly toward :ther outerrendgin -a relatively; cone shaped formation... The-inner4 ends-f or fthe. materialmay bet cutral'ong: axrelatively; fstrai ght line ,g aszeclearly Shown 'IIFg:

Fig. 5 disclosesaigflnishingfelement or pads I constructed: of a pluralitysorlayers: or material 2theioppositeiside'vvalls being relatively straight mate=- I bef. used/fon. such otheri purposes,` asfconditions and# then i converginggrinwardrly at. oppositeeends alongf the lines.;k I8 terminating..,4 into relatively straight ends`xI9,f-Eig;;5f.f Thefelement..I disclosed in Fig. 6 also comprises 'apllll'altyiosheetssof material havingg arr; outer. configuration similar to: thatadisclcsedfirr Figf.; 5; but. havinggside-:slots 2 Il; 2Ilformed therein whereby-thecelement .may be'iused Ito# perforinay certain particular.. typef of slnA f Y 'I'hepfinishingf element'fI ldisclosedv in Fig: 5imay have v'arelativelystraightouter. end .2.1 with. in. clinediside'. edges; 22,.,ther inclined sideedges 22 inclining:gsharplm as fat 123 and. .terminatinginto aibinntcnduf, i e

Regardless of the` shapefof `th1e-';sheetst-oi mate riaiifrom'l Which thef'elementr I1i is mada-,or the of materi'al'fwhich'is fused, :theesheetseare ...all stitched together; .asfxindieated at r3.1# The.l stitch;V ingrmay, be.` conventional ffa'br-ic fstitches f ori the stitchest:maircomprisemetal staplesif desired;

Irrsemezinstances: it :isadesirablethata rela-l tivelyt smootlr'nsh .or lapping ballad-.whereby the element I may compriseflayersfofsoftfabric stitched; together-as indicatedeat Setmprovideathe pocket 4r Abrasive-fmateriaifzmayfbe applied to thesfabric pads forr'elementszifjandfwhen .desired.

Ir'r.1 cases whereit is :ldesiredutofhave theesheet material 12' madexo abrasive .materal;v such-.fas sandpaperzorzem erycl'oth;A itiisdesirableithatthe abrasive: be applied.ltoithe eexterior;A surfacessas indicated :at- 25,1.'Figi 10;whereby?there.V will= be anfabrasive surfacezadaptedor:Contact with: the inside:oftheltubefregardlessio iwhether .the smantdrehis otatedzinmhezmanner.indicated by-thedi rectorrzofarrows irrrFig. .4eorrwhetherrtheematee riall islirctatedL in; ai. direction opllste-.ftcrsthat shown. in.Fig':.4;z.

Theabnoad .aspect ofrth'e. inventioncreside's in the: previsione ofi a finishing: elementizwhich.: is preferablyrcomposed .'of Ea: .plurality ofgsupcrim; posed layers? of.: materiali... The materiali from orfconstructtemof the mandrel, its only purpose is to providea drive for the element I.

In cases where the sheet material 2 of the elemen'tfliis abrasive material, it may be desirable to have the central part 26, Fig. "I, smooth with the abrasivelomopposite sidesasfindicatedat21, Eigelb l While -ithexdeviceherein 1.show-n.. andidescribed isA pasticularlygadapted dor. therinterior finishing of cylinders and other tubes, it mayfof course;

Changes Quay, be. made .in 7thefo11m-,construc tion-1' and-..arrangementzof-j.the parts :without :departingtfi'om':theespiritmtzthe invention or.. sacrinein-g, anyfon its advantages, and-fthe .right-is herehyresenvedto makeallf'suchchanges. as fair.- lylfall withinJtl-ie scope of-the..following.claims.

'.lll'ie.` invention.` is .herebyg claimed` as follows;

l. Annishingdevice emh odyngt a nnishingtele mentapocket-formedgin saidelement,V andV a driving. memberiV receivable .imsaidpocket fonrotating sai-d relemieni'.,` fand. a-parof..outer.A prongs Aimegral Iwithfiand spacedsfromatheemembere and between whichfmembenandssaid@prongsaportions oi-A said elementlare-disposed 2. A finishing device embodying a finishing-.element Imade upzoapluralitysof layersfof abrasive mate-nial,. .saldcnaterial- -being ystitched longitudinall-yorrloothsideswf itsflongitud-inal.- axial center line-sonasftoprovidea .p ocketftherein,` a mandrel havingga plurality1-ot-slots: formed.l therein andextending lengthwise thereof to provide afcentral prong andeouter spaced legs-,ftsaidncentralprong beingreceivablefin: said pocket; and. said'slots. receiving layersfofimaterial:

3;. In -afr iin-ish-ing. device; a e finishing element embodying@ a.'plurality.l off layersv` of. material stitchedftogethen. said:- layers` tot material being provided with anzabrasive surface onstheirexterior! sidesonly, lafprong insertable` betweenY said layers; and-exterior prongsfengageable with the outside csomeoffsaidlayers:

4v.: An abradingf. device embodyingr an abradingpadfsaidf'pad embo'dying a;.plurality fof plies as-4 sembled togetheriandtsecured-atl-spaced pointsadjacent and along an axis extending:lengthwiseiofv a=. driving element received'iin said :pocket and ariingenon` said .driving element engaging an outer face-of saidabradingiipad operatingtodnaintamthe element against slippintgtir'rV the spocket andfwith :respect to said pad.

Er,V Affdevicesfor flnishinggthe'finsides of tubular members; .embodyirrgg afrelatively.- flexible finishing relementl hafvingan; .interiore pocket therein, adapted to receive a drivingielemenma driving element-'including a-.nger receivable in sai-d pocket, and other finger: means associated with said nger 'and 'engageablez withrthe t,outside facer-of portions of the finishing element, to thereby prevent relative rotation of the finishing element with respect to the driving element.

6. A device for finishing the insides of tubular members embodying a relatively flexible nishing element, stitching through said element and forming a pocket adapted to receive a driving element, a driving element embodying a plurality of prongs, one of said prongs being receivable in the pocket, and portions of said finishing element being disposed between said prongs.

7. A nishing device embodying a finishing element made up of a plurality of layers of material, the layers of material being stitched together to form a pocket therein adapted to receive a, driving member, a driving member including a pair of outer prongs engageable with the outside of the nishing element, and a. central prong receivable in said pocket, and portions of the element being also disposed between the outer and central prongs.

8. A finishing device embodying a. nishing element made up of a plurality of layers of material, the layers of material being flexible, means for securing said layers together, said means and the layers of material dening a pocket for receiving a driving element, and a driving element including a central prong receivable in said pocket and a pair of outer prongs engageab-le with the exterior of the outermost layers of material.

EUGENE I. HARRISON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 987,959 Coney Mar. 28, 1911 1,670,068 Grimes May 15, 1928 2,076,776 Hadaway Apr. 13, 1937 2,095,379 Coney Oct. 12, 1937 2,316,257 Krastin Apr. 13, 1943 2,370,491 Rice Feb. 27, 1945 

